| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have been happen in | 24 |
|
| 2 | what [verb] been happen in | 24 |
|
| 3 | [Wh det] [verb] been happening in | 24 |
|
| 4 | [Wh det] [vb -s] been happen in | 22 |
|
| 5 | [Wh det] has been happen in | 12 |
|
| 6 | [Wh det] 's been happen in | 10 |
|
